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The quasi-energy spectrum of two charged particles in a one-dimensional lattice system driven by an external field are theoretically studied with the help of numerical calculations. It is found that the quasi-energy spectrum splits into two regions. In the gourd-shaped region the Floquet states mainly contain the Wannier states |l,m〉 (l≠m), which describe the two particles occupy the different sites...
Within a single-band tight-binding model, we investigate the property of dynamical localization of a one-dimensional semiconductor superlattices under a dc-bichromatic electric field. We obtain analytically the quasi-energy spectrum of the system and the conditions of dynamical localization. The results show that they depend sensitively on the frequency ratios, ω 0 /ω 1 and ω 2...
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